[TowerTalk] Sharing a COM Port?

[Alan NV8A]

I used to have SatPC32 in Yaesu mode controlling my Flex5K+VU5K and my 
AlfaSpid rotator (in Yaesu mode) via DDUtil until some time ago when 
Yaesu mode was dropped from the acceptable inputs of DDUtil: it now 
accepts only Hy-Gain mode, and SatPC32 does not have a Hy-Gain option 
because there are no Hy-Gain rotators with an Elevation capability.

Is there some way of having the rotator (on COM2) controlled by two 
different programs: by DDUtil when I am not doing satellite stuff, and 
by SatPC32 when I am working satellites? Maybe with one or more virtual 
COM ports somewhere in the mix -- e.g., both programs driving virtual 
ports that are then linked to the real COM2? The Eterlogic program looks 
as though it might be able to create a suitable setup, but there is no 
free trial available for the 64-bit version.

Alan NV8A